(65) باب الصَّلاَةِ بِجَمْعٍ
The aforesaid tradition has also been transmitted to the same effect by by Al Zuhri with a different chain of narrators beginning with Ibn Hanbal on the authority of Hammad. This version adds "With an iqamah for every prayer, he did not call adhan for the first prayer and he did not offer supererogatory prayer after any of them. The narrator Makhlad said "He did not call adhan for any of them."
Reference: Sunan Abi Dawud 1928
In-book reference: Book 11, Hadith 208
English translation: Book 10, Hadith 1923